.top{
    height: 50px;
    line-height: 50px;
    background-color: #424242;
    text-align: center;
}
.account_item{
    padding: 10px 15px;
    background-color: #424242;
    .arrow:after{
        content: '';
        display: inline-block;
        width: 8px;
        height: 13px;
        margin-left: 5px;
        position: relative;
        top: 2px;
        background-size: cover;
        background-image: url(../img/arraw_right.png);
    }
}
